I'm not that familiar with the case but isn't the claim that Google basically wrote their own version of the Java apis? Copying the titles/key plot sentences I think means copying the behaviour (or perhaps even the code) required to make their Java APIs behave like Sun's?
Java is licensed under the GPL, yes? In which case Google would also have to release their code under the GPL, no? (They may have done this, I'm not familiar with the situation.) Code being open source doesn't mean you can do what you want with it, it still has to be allowed by the license.